respirator

noun

res·​pi·​ra·​tor ˈre-spə-ˌrā-tər How to pronounce respirator (audio)
plural respirators
1
: a mask or device worn over the mouth and nose to protect the respiratory system by filtering out dangerous substances (such as dusts, fumes, or bacteria) from inhaled air

Note: Particulate respirator masks are only able to filter out particles and are not effective against gases or vapors. A numerical rating (such as 95 or 99) is sometimes assigned to such a respirator to indicate the percentage of airborne particles filtered. A letter may also be assigned to indicate whether it is somewhat resistant (R), not resistant (NR), or strongly resistant (P) to the degrading effects of oil on proper respirator function.

2
: a device for maintaining artificial respiration : ventilator sense b

Examples of respirator in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There was a pile in one corner of large rubber respirators, but none of the men was using them. Daniel Stone, Smithsonian Magazine, 12 Feb. 2025 The execution began at about 6:10 p.m after a corrections officer did a final check of the respirator mask used to administer the nitrogen gas. CBS News, 6 Feb. 2025 Tariffs against China would be a major step toward leveling the playing field for the manufacturers of supplies like medical gloves, gowns, respirators and needles, Eric Axel, executive director of the American Medical Manufacturers Association, told Axios. Tina Reed, Axios, 5 Feb. 2025 When outside, people should wear particulate respirators that have been tested and approved by the National Institute of Occupational Safety and Health. Dr. Jade Cobern, ABC News, 14 Jan. 2025 See all Example Sentences for respirator 

Word History

First Known Use

1836, in the meaning defined at sense 1

Time Traveler
The first known use of respirator was in 1836

Dictionary Entries Near respirator

Cite this Entry

“Respirator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/respirator. Accessed 20 Feb. 2025.

Kids Definition

respirator

noun
res·​pi·​ra·​tor ˈres-pə-ˌrāt-ər How to pronounce respirator (audio)
1
: a device covering the mouth and nose especially to prevent the breathing in of harmful substances (as dust or fumes)
2
: a device used to maintain artificial respiration

Medical Definition

respirator

noun
res·​pi·​ra·​tor ˈres-pə-ˌrāt-ər How to pronounce respirator (audio)
1
: a mask or device worn over the mouth and nose to protect the respiratory system by filtering out dangerous substances (as dusts, chemical fumes, or bacteria) from inhaled air

Note: Particulate respirator masks are only able to filter out particles and are not effective against gases or vapors. A numerical rating (such as 95 or 99) is sometimes assigned to a particulate respirator to indicate the percentage of airborne particles filtered. A letter may also be assigned to indicate whether it is somewhat resistant (R), not resistant (NR), or strongly resistant (P) to the degrading effects of oil on proper respirator function.

2
: a device for maintaining artificial respiration : ventilator

More from Merriam-Webster on respirator

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